Lock box



FIG. 1 is a perspective view of a lock box showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view being the same;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a side elevational view thereof, both sides being the same. 

The ornamental design for a lock box, as shown and described. 